Travis Nicholson

National University of Singapore

Ultracold atomPhase (waves)OpticsPhysicsLaser linewidthQuantum statePhotonDipoleBound stateAtomic physicsMaterials scienceAtomic clockCondensed matter physicsNonlinear mediumAtomic beamComputational physicsStability (probability)Feshbach resonanceOptoelectronicsLaserQuantum information scienceQuantum mechanicsRydberg formulaQuantumQuantum sensorOptical latticeQuantum metrology

46Publications

10H-index

1,787Citations

Publications 45

#1Haonan LiuH-Index: 2

#2Simon B. JägerH-Index: 8

Last. Murray HollandH-Index: 46

view all 7 authors...

#1Simon B. JägerH-Index: 8

#2Haonan Liu (NIST: National Institute of Standards and Technology)H-Index: 2

Last. Murray HollandH-Index: 46

view all 5 authors...

We theoretically analyze the collective dynamics of a thermal beam of atomic dipoles that couple to a single mode when traversing an optical cavity. For this setup we derive a semiclassical model and determine the onset of superradiant emission and its stability. We derive analytical expressions for the linewidth of the emitted light and compare them with numerical simulations. In addition, we find and predict two different superradiant phases; a steady-state superradiant phase and a multi-compo...

#1Haonan LiuH-Index: 2

#2Simon B. Jäger (NIST: National Institute of Standards and Technology)H-Index: 8

Last. Travis Nicholson (NUS: National University of Singapore)H-Index: 10

view all 7 authors...

We propose a new type of superradiant laser based on a hot atomic beam traversing an optical cavity. We show that the theoretical minimum linewidth and maximum power are competitive with the best ultracoherent clock lasers. Also, our system operates naturally in continuous wave mode, which has been elusive for superradiant lasers so far. Unlike existing ultracoherent lasers, our design is simple and rugged. This makes it a candidate for the first widely accessible ultracoherent laser, as well as...

#1Haonan LiuH-Index: 2

#2Simon B. JägerH-Index: 8

Last. Travis NicholsonH-Index: 10

view all 7 authors...

We propose a steady-state, ultracoherent laser based on superradiance from a hot atomic beam traversing an optical cavity. Our design is considerably simpler than existing ultrastable lasers due to its uncomplicated atomic source and straightforward cavity. Nevertheless, its minimum linewidth and maximum output power are competitive with the best narrow-linewidth light sources. We show that, because of atomic phase synchronization, the phase of the output light is robust against decoherence aris...

#1Haonan LiuH-Index: 2

#2Simon B. JägerH-Index: 8

Last. Murray HollandH-Index: 46

view all 6 authors...

#1Qiyu Liang (MIT: Massachusetts Institute of Technology)H-Index: 8

#2Aditya V. Venkatramani (Harvard University)H-Index: 4

Last. Vladan Vuletic (MIT: Massachusetts Institute of Technology)H-Index: 65

view all 10 authors...

Bound states of massive particles, such as nuclei, atoms, or molecules, constitute the bulk of the visible world around us. By contrast, photons typically only interact weakly. We report the observation of traveling three-photon bound states in a quantum nonlinear medium where the interactions between photons are mediated by atomic Rydberg states. Photon correlation and conditional phase measurements reveal the distinct bunching and phase features associated with three-photon and two-photon boun...

#1Travis NicholsonH-Index: 10

#2Jeff D. ThompsonH-Index: 19

Last. Vladan VuleticH-Index: 65

view all 10 authors...

#1Qiyu LiangH-Index: 8

#2Sergio CantuH-Index: 4

Last. Vladan VuleticH-Index: 65

view all 10 authors...

#1Jeff D. Thompson (Princeton University)H-Index: 19

#2Travis Nicholson (MIT: Massachusetts Institute of Technology)H-Index: 10

Last. Vladan VuleticH-Index: 65

view all 11 authors...

Excitations to Rydberg states in a gas of ultracold atoms are used to produce a robust, nonlinear phase shift of exactly π/2 between two photons, which is protected against variations in experimental parameters by a symmetry of the system.

#1Sergio CantuH-Index: 4

#2Qiyu LiangH-Index: 8

Last. Vladan VuleticH-Index: 65

view all 10 authors...

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